Thunderbird, a free, open-source desktop email client, lets users retrieve and read messages from a variety of email servers. One of Thunderbird's benefits for a small business is its ability to ...

The ability to receive, download and open email attachments in your Yahoo email is crucial to your business, as email attachments can contain invoices, memos and other important business documents.

You can select any of the above options. If you want to open the file, click Open. As explained above, this is not an error message. It is a warning message which can ...